* {
    margin: 0;
    position: 0;
}

body {
    background-color: lightgray;
}

a {
    text-decoration: none;
    color: #000;
}

a:hover>*,
a:active>*,
a:visited>* {
    color: #000;
}

ul,
li {
    list-style: none;
}

@keyframes rotation-accelerate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes rotation-decelerate {
    0% {
        -webkit-transform: rotate(0deg);
    }

    20% {
        -webkit-transform: rotate(150deg);
    }

    60% {
        -webkit-transform: rotate(270deg);
    }

    80% {
        -webkit-transform: rotate(350deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
    }
}



.nav {
    width: 100%;
    box-shadow: 0px 1px 8px #808080;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background-color: #ffffff;
    z-index: 9;
    position: relative;
}

.nav li {
    height: 70px;
}

.nav a {
    padding: 20px 30px;
    vertical-align: middle;
    font-size: 24px;
    line-height: 70px;
}

.nav a:hover {
    background-color: #ddd;
}


.flex-container-between {
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: space-between;
    justify-content: space-between;
}

.flex-container-start {
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: flex-start;
    justify-content: flex-start;
}

.flex-container-end {
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: flex-end;
    justify-content: flex-end;
}

.card {
    width: calc(90vw + 20px);
    margin: 20px auto;
    background-color: white;
    border-radius: 20px;
    padding: 30px;
}